广西植物Issue(6)：793-798,864,7.DOI:10.3969/j.issn.1000-3142.2014.06.011
林地覆盖经营雷竹林叶片养分特征及其与土壤养分的关系
Correlations between soil nutrient contents and nutrient characteristics of Phyllostachys violascens leaves under mulching management
摘要
Abstract
Phyllostachys violascens is a favorite bamboo shoot species that has been widely planted in southern China. High rate of fertilization and heavy winter mulch have been a common practice to gain a good yield and better eco-nomic benefit.However,the longterm use of the above techniques can also result in a series of negative environmental and ecological consequences,such as degradation of soil physical and biological properties,increases in soil heavy metal concentrations,premature degradation of bamboo forest ecosystems.In order to reveal the degradation mechanism of mulched stand of P .violascens forest,and provide theoretical guidence for regeneration of degraded bamboo forest, leaf nutrient concentration,nutrient stoichiometry,and nutrient resorption efficiency of 2-year culms from short-term mulching (1 a),respite-mulching (mulched 3 a and rest 3 a),long-term mulching (6 a)and non mulching stand(CK)were analyzed,as well as their relationships with soil nutrient characteristics were analyzed.The results showed that short-term and the respite-mulching treatment increased mature leavf N,P,K concentrations and leaf nutrient resorp-tion effiency compared with CK.Leaf P concentration,N,P resorption efficiency were influenced by long-term mulc-hing,which increased mature leavf P concentration and leaf N resorption efficiency,and decreased leaf K resorption ef-ficiency.Compared with CK,the short-term mulching and respite-mulching treatment did not affect stoichiometric ra-tio in leaves and soil,but long-term mulching treatment led to a decline in N∶P and K∶P.Compared with CK, short-term mulching treatment increased the correlation among soil and leaf nutrient concentration,nutrient stoichi-ometry,and nutrient resorption efficiency,but the correlation weakened with the increasing of mulching years.All re-sults showed that soil nutrient concentrations and their balances remarkably influenced leaf nutrient characteristics. The correlation among soil and leaf nutrient characteristics became less correlated,and the absorption capacity of nu-trients declined in the long-term mulched stand.The respite-mulching management should be applied in production practices.关键词
雷竹/林地覆盖经营/土壤养分/叶片养分/养分再吸收率Key words
Phyllostachys violascens/mulching management/soil nutrient concentration/leaf nutrient concentra-tion/nutrient resorption efficiency分类
农业科技引用本文复制引用
陈珊,陈双林,郭子武,樊艳荣..林地覆盖经营雷竹林叶片养分特征及其与土壤养分的关系[J].广西植物,2014,(6):793-798,864,7.基金项目
浙江省农业科技成果转化项目(2012T201-03) （2012T201-03）
国家林业局林业科技推广项目([2011]02号) （[2011]02号）
浙江省林业科技推广项目(2011B01) （2011B01）
